Filter.



B. DANZIGER.

FILTER. APPLICATION FILED JULY 12, 1911.

1,029,915, Patented June 18,1912.

2 SHEETS-SHEET 1.

- JX/VENT R.

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-. B. DANZIGER.

FILTER. APPLICATION FILED JULY 12, 1911.

1,029,915, Patented June18,1912.

' 2SHEETSSHEBT 2. 2 (23 @W M I INVENTOR.

A TTORNEYX' STTES ANT @HKQ BENNO DANZIGER, or MAN HEIM, GERMANY, assIoNoR 'ro NATHAN H. 'HEYMAN,

. or NEw'YonK, N. Y.

FILTER.

To all whom it may concern.

Be it known that I, BENNO DANzIoEn, a subject ofthe Grand Duke of Baden, residing at' 29. Carl-Ludwigstrasse, Mannheim, 5 Germany, have invented the new and useful Improvements in Filters hereinafter fully set forth.

The invention is a filter for liquids such as beer, and is more especially an improve- 10 ment in that type of liquid filter which is composed of a plurality of sections or indi- V vidual filter elements compressed together in a suitable frameand forming when thus assembled a continuous 'filtendrum with the filter mass and suitable liquid and gas conduits contained therein. 7

The object of the invention is to improve the capacity, efliciency and durability of such filters, as well as to improve the convenience, with which they may be set up and taken apart and cleansed, all of which will in full appear from the description below and the accompanying two sheets of drawings forming part hereof. In said drawings, Figure 1 is a perspective view of a filter press constructed in accordance with this invention; Fig. 2 a plan view on enlarged scale of one of the filter elements thereof; Fig. 3 a section of several so adjacent filter elements taken on the staggered line IIL-III of Fig. 2; and Fig. 4 is a similar section of a pair of assembled ele- .ments of modified form, but taken on the same section line as Fig. 3;.

The frame or ress shown in Fig. 1 comprises a terminal foot plate 1 connected by .two parallel side bars 2, with a head standard 3, all of which parts are mounted on a suitable under-frame provided with wheels or casters. The frame also comprlses ainovable terminal head-plate .4, which is adapted- -to slide on the side bars under the action of the screw and hand-wheel 5. The several I filter-elements are adapted-to be hung upon parallel side bars. between the terminal lates 1 and l, in which position they may c all pressed to ether by the appropriate operation of the land-wheel so as to form liquid-wtight joints between each other, and the-tw terminal plates thus producing a continuous though sectional, filter plrum or easing through which the liquid to be illtered is passed. The liquid inlet, which is marked 6,-niay"be connectedto the movable head plate 4, and-the outlet 7 to the sta- Specification of Letters Patent.

Application filed July 12, 1911. Serial No. 638,062.

tionary foot plate 1, or in any other'suitable manner, as will be made apparent farther on. The casing is preferably disposed upon the frame in a horizontal position, and a gas escape cock. 8 is provided at the top of the head plate.

Patenteddune 18, 1912.

The filter elements each consist of a shell wall '9 which is desirably though not necessarily made of circular section and provided with opposite hooks or' cars 10 by which it may rest in a vertical position upon the side bars 2 of the press. It is also conveniently supplied with handles 11 by which it may be lifted. Inthe side or margin of the shell which is lowest when it is in position .in the press, there is provided a pair of perforations which are adapted to register with corresponding perforations in adjacent shells to form longitudinal conduits through the filter drum wall. One of these conduits, marked 12 in the drawing, is intended to conduct the turbid liquid to the filter mass, and the other, marked 13, to conduct the clear liquid from it, for which purpose the perforation 12 in each alternate shell is connected by a branch passage 12 with the in terior of the shell wall, while the perforation 13 in the intervening elements is connected by a similar branchpassagc 13 (see dotted lines in Figs. 3 and 4:) with the interior of their shell walls. The interior of each sue cessive element in the series is thus connected with its conduit perforation 12 and 18 in alternation. At the side of each shell wall which is uppermost in the filter press, a duplicate pair of conduit perforations i l and 15 is provided, which perforations are similarly connected by passages 14 and 15 respectively and in alternation, with the interiors of their respective shells. The con (luits formed by these upper registering perforations serve to collect and lead away the gas that may escape from the liquid passing through the filter, without, however, forming a by-pass for such liquid by which it may escape passage through the filter mass. Except for the diii'erence in the connection of the interior of the shells with their conduit perforations, the several elements are or may-be all duplicates of each other in structure. The perforations 12, 13, 14. and 15 areconvenieiitly formed in projecting lugs at thetop and bottom of each shell wall, as shown in the drawings.

The filter mass is contained within the enter rabbet-tenon interior rabbet-tenon being respectively in planes above and belowthe opposite ribbed sides of the bottom plate and constituting clamps for the marginal portions of filter layers which are' thus compressed between planes removed from the ribbed sides of the plates.

2. In a sectional filter, two filter elements constituting sections thereof and each consisting of a shell wall having a bottom plate permanently secured thereto and provided with ribs affording a multiplicity of narrow conducting channels in its surface, the upper rim of said wall formed with an exterior tenon and an interior recess and the lower rim thereof formed with an interior rabbettenon of materially less depth than the said recess, in combination with a layer of filtering material filling the chamber between said plates and contacting directly with, both, the interior rabbet-tenon of one shell fitting inside the exterior tenon of the other shell, and the margin of said filter layer being compressed between said interior rabbet-tenon and the bottom of said recess to a thickness materially less than the body of the layer so as to be offset from said ribs and rendered practically impervious.

In a sectional filter, a pan-shaped filter element consisting of a shell wall having a bottom plateribbed in its central portion and provided with a peripheral liquid canal, the upper rim of the shell formed with an and an inner rabbet groove providing a jog above the said canal, and the lower rim formed of an inner rabbet-tenon of less depth than'said groove and adapted to fit in the upper rabbet grooves of other like elements.

4. In a sectional filter, a pulp-containing filter element comprising a bottom plate having non-uniform bearing upon the pulp, thereby providing channels for conducting liquid to or from the same, ashell wall surrounding the edge of said plate and supplied with an under-cut jog providing a peripheral canal communicating with said channels.

5. In a sectional filter, a plurality of juxtaposed filter elements each comprising a shell wall having a permanent liquid-conducting bot-tom plate, the upper rim of said wall being formed with an outer rabbettenon and an inner jog projecting over the marginal face of the bottom-plate to form a liquid-conducting canal therefor, and the lower rim being formed with an inner rabbet tenon adapted to clamp the margin of the filter mass upgp the jog of an adjacent like element. i

6. A filter composed of a series of successively juxtaposed filter elements, containing filteiemass and each serving to confine and press the filter mass in its neighbor, saidelements each comprising an outer shell wall 9 having apertures 12-and 13 in its lower side and apertures 14 and 15 in its upper side, ject-ing lug portions of the wall and being arranged in registry with like apertures in adjacent elements, permanently secured to the shell wall and having the canals 21, and communicating passages 12', 14:, and 13', 15', from said canals to said registering apertures, and the pulp-clamping members 24 and 25 arranged respectively on opposite sides of each element and respectively above and below the opposite ribbed sides of said bottom plate,

to clamp the margin of the filtermass in each element.

In testimony whereof, I have signed this specification in the presence of two witnesses.

BENNO DANZIGER. Witnesses:

i\RI-1Hl) O. TITTMANN, S. H. SHANK.

said apertures being formed in proa ribbed bottom plate 16 

